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Common Rail Turbo Diesel
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When changing the antifreeze first drain the old fluid by disconnecting the lower radiator hose. Plug the hose in and add coolant to the radiator. Check for air in the system, bleed if necessary.
you may have a fuel leak from the tank or other place, such as fuel lines, pump, etc.or it could just be in need of a service * These common rail diesels build up pressures often around 1600 pounds/sq.in.Please take great care not to undo any pipes.Have you got a choked up air filter? You may have a faulty injector which can only be diagnosed correctly with the vauxhall test equipment.Is this motor still under warranty?If there are no obvious leaks then it must be overfuelling,and will cause engine damage if not cured shortly. As above, but also: One, check the Air filter is not blocked, or just replace it anyway, they are not expensive. Two, Phone your local dealer, and ask them to check the car on "VX Care" (they will know what this is) to see if there is an outstanding "rework" (I.E. fix for a known problem) - for the "Diesel Particulate Filter." If so, it may (And I do say MAY!) be done under warranty, depending on mileage, and service history etc. Three, you have lead feet.